CVE-2026-118030
Medium · 4.2CVSS
4.2
EPSS
0.2%
Published
Oct 29, 2026
CISA due date
—
The record
A flaw was found in the HOTP authentication mechanism of the keycloak-services component, which provides identity and access management services. The issue occurs because the system validates a one-time password and updates its internal counter in two separate steps without proper locking. An attacker with a users password could exploit this timing gap to use a single one-time code to log in multiple times simultaneously.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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